CVE-2017-5993 : Security Advisory and Response
Learn about CVE-2017-5993, a memory leak vulnerability in virglrenderer before 0.6.0 allowing local guest OS users to cause denial of service by consuming host memory.
A vulnerability in virglrenderer before version 0.6.0 allows local guest OS users to launch a denial of service attack by consuming host memory through a specific method.
Understanding CVE-2017-5993
This CVE entry describes a memory leak vulnerability in virglrenderer that could be exploited by local users to cause a denial of service on the host system.
What is CVE-2017-5993?
The vulnerability exists in the vrend_renderer_init_blit_ctx function in vrend_blitter.c in virglrenderer before version 0.6.0. It enables local guest OS users to trigger a denial of service by utilizing a large number of VIRGL_CCMD_BLIT commands.
The Impact of CVE-2017-5993
The vulnerability allows local users to exhaust host memory resources, leading to a denial of service condition on the affected system.
Technical Details of CVE-2017-5993
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service by consuming host memory through the execution of a large number of VIRGL_CCMD_BLIT commands.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by local guest OS users executing a significant number of VIRGL_CCMD_BLIT commands, leading to excessive consumption of host memory.
Mitigation and Prevention
Protecting systems from CVE-2017-5993 requires specific actions to mitigate the risk and prevent exploitation.
Immediate Steps to Take
- Apply the official patch or update to version 0.6.0 or later to address the vulnerability.
- Monitor system resources for unusual memory consumption patterns.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access and actions.
- Regularly update and patch software to prevent known vulnerabilities.
- Conduct security training for users to recognize and report suspicious activities.
Patching and Updates
Ensure timely installation of security patches and updates for virglrenderer to eliminate the vulnerability and enhance system security.